2020 Toyota
HIGHLANDERProblems & recalls

Some 2020 – 2026 model year Highlander and Highlander Hybrid vehicles may exhibit a water leak from the roof rack attachment clips. This may be caused by the sealant in the roof channel obstructing the proper seating position for the clip gasket.

Campaign / software reference: T-SB-0040-24 Rev1

Components: STRUCTURE:BODY. Confirm detailed applicability in the original document.

Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the rear underbody air conditioner tube and accessory assembly. The anti-corrosion material has been updated to reduce the possibility of this condition.

Campaign / software reference: T-SB-0021-26

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.

Campaign / software reference: T-SB-0106-22 Obsolete

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.

Campaign / software reference: T-SB-0001-26

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Service Bulletin is to provide general guidelines and procedures for odor remediation. This Service Bulletin provides a guide on how to prepare and treat the interior of the vehicle for odor remediation. Refer to the applicable model and model year Repair Manual and the EPA (Environmental Protection Agency) website for the most up-to-date safety and precautionary guidelines.

Campaign / software reference: T-SB-0055-24 Rev2

Components: UNKNOWN OR OTHER. Confirm detailed applicability in the original document.

Some 2020 – 2023 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the Power Back Door (PBD) will not open or close and/or stops moving while opening or closing. A modified PBD unit assembly is available to address these conditions.

Campaign / software reference: T-SB-0086-25

Components: STRUCTURE:BODY. Confirm detailed applicability in the original document.

Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start.

Campaign / software reference: 22TE09

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.

Campaign / software reference: T-SB-0058-23 Rev1

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.

Campaign / software reference: T-TT-0780-25

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.

Campaign / software reference: T-TT-0780-25

Components: ELECTRICAL SYSTEM. Confirm detailed applicability in the original document.

TT: Engine Oil Leak between the Lower Oil Pan and Crank Case

Components: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV) · UNKNOWN OR OTHER. Confirm detailed applicability in the original document.

The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicle surface, especially the horizonal areas of the hood, roof, and decklid, significant damage can occur. This damage is the result of actual etching of the paint and appears as pitting or water spots. As acid rain droplets on the vehicle surface evaporate, the concentration strength of the acid increases, causing deeper and more rapid damage. This evaporation and corrosive action also occur more rapidly on dark colored cars as direct sun heat increases. It is the dealer’s responsibility to protect and maintain the quality of the vehicle’s paint finish after receipt at the dealership prior to the first sale. In areas known for high frequency and/or concentration of acid rain, frequent vehicle washing during high heat or humidity periods will minimize the potential for paint damage caused by acid rain. It is further recommended that either reverse osmosis or deionized water be used to prevent water spotting.

Campaign / software reference: T-SB-0039-24 Rev2

Components: STRUCTURE:BODY. Confirm detailed applicability in the original document.